Cornerback D.J. Hayden, the Raiders' first-round pick a year ago, will miss this week's minicamp as he remains in a walking boot three weeks after spraining his ankle.

It's the second straight year that Hayden has essentially missed the team's entire offseason program. He had follow-up surgery for scar tissue in his abdomen last summer.

Oakland coach Dennis Allenexpects Hayden to be ready for training camp in five weeks, but admitted this is another setback in the cornerback's development.

"It's definitely a setback, there's no question about it," Allen said after Tuesday's practice. "I mean, D.J.'s still a young player, he needs a lot of reps, but I don't think it's the end all, be all. I don't think it's something that he can't overcome, but he's got to stay into it mentally."

Because cornerback Carlos Rogerswas also out with a minor calf injury, Tarell Brownand Chimdi Chekwa were the starting cornerbacks at practice on Tuesday.

Briefly: Guard Lucas Nix had knee surgery Tuesday and is the one player Allen said is questionable for the start of training camp. ... Reserve linebacker Miles Burrisgot a lot of first-team reps, another sign that Kevin Burnett's days in silver and black are numbered. Sio Mooreis the likely starter ahead of Burris on the outside, opposite rookie Khalil Mack, and Burnett doesn't play special teams. ... The Raiders' and Cowboys' joint training camp practices in Oxnard are scheduled for Aug. 12 at 4 p.m. and Aug. 13 at a morning time to be determined.